大家好，我是来自中国大陆的开发者。
我在亚马逊应用内购买的接入中遇到了一个审核问题，我的应用经过 App Tester 测试100%通过，但是在我提交审核后被拒绝了，拒绝理由是：点击IAP项目无法完成购买。这让我非常疑惑，多次检查官方文档以及我的接入代码，并且测试之后依然正常。
在对log进行仔细分析时，我发现了两条输出异常的信息：
1：E/Kiwi: Appstore SDK - Production Mode: c: Error in sendResponse: java.lang.NullPointerException: Attempt to invoke virtual method 'java.lang.String com.amazon.device.iap.model.UserData.getUserId()' on a null object reference。
2：E/Kiwi: AbstractCommandTask: On Exception!!!!: com.amazon.a.a.n.a.a.a: AUTH_TOKEN_VERIFICATION_FAILURE: null: null。
这两条信息是否与内购有关，我需要使用亚马逊的账户登录SDK吗？感谢大家。
---English---
Hello, I am a developer from Chinese Mainland.
I encountered an audit problem in the access purchased in Amazon app. My app passed 100% of the app tester test, but was rejected after I submitted it for audit. The reason for rejection is that clicking IAP project can not complete the purchase. I was still puzzled by the official code after many tests.
When analyzing the log carefully, I found two messages of abnormal output:
1：E/Kiwi: Appstore SDK - Production Mode: c: Error in sendResponse: java.lang.NullPointerException: Attempt to invoke virtual method 'java.lang.String com.amazon.device.iap.model.UserData.getUserId()' on a null object reference。
2：E/Kiwi: AbstractCommandTask: On Exception!!!!: com.amazon.a.a.n.a.a.a: AUTH_TOKEN_VERIFICATION_FAILURE: null: null。
Are these two pieces of information related to internal purchase? Do I need to use Amazon's account to log in to the SDK? Thank you
